To own as genuine or valid; to assent to (a legal instrument) to give it validity; to avow or admit in legal form.
To own or recognize in a particular quality, character or relationship; to admit the claims or authority of; to give recognition to.
To be grateful of (e.g. a benefit or a favour)
To admit the knowledge of; to recognize as a fact or truth; to declare one's belief in
To report (the receipt of a message to its sender).
To cancel or invalidate by withdrawing or reversing.
The act of revoking in a game of cards.
A violation ranked in seriousness somewhat below overt cheating, with the status of a more minor offense only because, when it happens, it is usually accidental.
A renege; a violation of important rules regarding the play of tricks in trick-taking card games serious enough to render the round invalid.